Runners in Moldova’s 10km run were rewarded with a glass of wine at the finish line in the world’s largest wine cellar, Milestii Mici State Winery. The event aimed to promote Moldova’s wine industry and attract visitors to the country. Moldova is the least visited country in Europe and has a breakaway region, Transnistria. More […]
Underground irrigation supplies water to gardens and lawns through buried pipes or tubes. Types include irrigation pipes, drip irrigation, and sprinkler systems. PVC fittings connect the hose to the water source, and timers avoid manual on/off. Drip irrigation delivers water to the roots and can also feed plants with liquid fertilizer. Sprinkler systems use pop-ups […]
Underground mining involves digging into the ground to extract minerals and ores, often used when surface mining is not an option. It requires logistics to be safe and uses machinery to avoid health and safety hazards. Ventilation and proper support are important, with different types of mining including well and slope mining. Underground mining is […]
The National Underground Railroad Freedom Center in Cincinnati, Ohio is a museum dedicated to preserving the history of slavery in the US and challenging visitors to think about serious issues and historical events. The museum features interactive displays, a slave pen exhibit, and a theater showing slavery-related films. It also highlights modern-day slavery issues and […]
Underground drainage systems are used in areas with slow soil drainage, such as agricultural fields and paved areas. Excess water can harm plants and damage pavement. Drainage systems use pipes or channels to remove water from the field or road, and are designed to work with the contours of the land. Road drainage systems have […]
The use of quilt codes as secret symbols for escaped slaves on the Underground Railroad is a popular but potentially inaccurate myth. While some quilting patterns may have been used as signals, others were not invented until after the Civil War. The tradition is based largely on the recollections of a slave’s daughter and has […]
The London Underground map may seem complex, but it’s easy to use. Stations have maps and attendants to help, and tickets can be bought for single or unlimited use. The system is divided into zones, and lines are color-coded. Rush hour is busy, and the system shuts down at night. A first glance at a […]
Groundwater reservoirs can be managed by government agencies to ensure clean and safe water supplies. Boundaries can be difficult to determine, especially when aquifers are at different depths. Contamination and overuse are major concerns, and hydrologists study groundwater to determine safe usage levels. A groundwater reservoir is an underground reservoir of water that can take […]
Underground storage tanks hold oil or other liquids with 10% or more of their mass below ground. They are regulated by the US EPA for commercial use and must monitor groundwater for leaks. Tanks can rust and degrade, causing pollution. Homeowners can convert to above ground tanks, but some states don’t allow resale. Leak detection […]
Rising unemployment rates in the legitimate economy can lead to an increase in the shadow economy, as workers seek alternative ways to earn money. The shadow economy offers opportunities for those who are willing to engage in illegal activities, but some may not return to the legitimate workforce even if the economy improves. While measuring […]
Underground mining jobs require various skills and training, including geologists, mining engineers, environmental engineers, machine operators, mine safety inspectors, mechanics, and carpenters. Geologists use data to test new mining sites, while mining engineers plan the mining operation. Environmental engineers ensure compliance with regulations. Machine operators, mine safety inspectors, mechanics, and carpenters work at mining sites. […]
